Jacinta is collecting dimes everyday. She collected 1 dime on the first day, 2 dimes on the second day, and 4 dimes on the third day. She continues this pattern for an indefinite amount of time.

Which rule models this situation?

a_{n}=−2+a _{n-1}

a_{n}=−2^{n-1}

a_{n}=2^{n-1}

a_{n}=2⋅a_{n+1}

jjennylove Jan 8, 2019

#1**+2 **

The third one......test it by putting in values for the n

n=1 she saves 1 dime 2^(1-1) = 2^0 =1 Check!

day2 n=2 she saves 2 dimes 2^(2-1) = 2^1 = 2 check !

day3 n=3 she saves 4 dimes 2^(3-1) = 2^2 = 4 check!

etc

etc.

ElectricPavlov Jan 8, 2019

#1**+2 **

Best Answer

The third one......test it by putting in values for the n

n=1 she saves 1 dime 2^(1-1) = 2^0 =1 Check!

day2 n=2 she saves 2 dimes 2^(2-1) = 2^1 = 2 check !

day3 n=3 she saves 4 dimes 2^(3-1) = 2^2 = 4 check!

etc

etc.

ElectricPavlov Jan 8, 2019